Ford 1996 Bronco Manual page 339

of driving required to reach the ready condition
varies with individual driving patterns. To
complete this requirement in the minimum
amount of time, refer to the OBD II Drive Cycle
defined below. If the vehicle owner cannot or
does not want to do the additional driving
required by law, a service center can perform
this drive cycle as it would any other type of
repair work.
OBD II Drive Cycle
The engine must be warmed up and at
operating temperature before proceeding with
the drive modes of the following OBD II Drive
Cycle.
1. Start the engine. Drive or idle (in neutral)
the vehicle for 4 minutes.
2. Idle the vehicle in drive (neutral for manual
transmission) for 40 seconds.
3. Accelerate the vehicle to 45 mph (72 km/h)
at 1/4 to 1/2 throttle for 10 seconds.
4. Drive the vehicle with a steady throttle at
45 mph (72 km/h) for 30 seconds.
5. Idle the vehicle in drive (neutral for manual
transmissions) for 40 seconds.
6. Continue to drive the vehicle in city traffic at
speeds between 25 and 40 mph
(40-64 km/h) for 15 minutes. During the 15
minute drive cycle the following modes must
be achieved:
a. at least 5 stop and idle modes at 10
seconds each
b. acceleration from idles at 1/4 to 1/2
throttle position, and
c. choose 3 different speeds to do 1.5
minute steady state throttle drives.
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